1659944072490 has 128 divisors (see below), whose sum is σ = 4606242930432. Its totient is φ = 378364293120.

The previous prime is 1659944072477. The next prime is 1659944072491. The reversal of 1659944072490 is 942704499561.

It is not an unprimeable number, because it can be changed into a prime (1659944072491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5536884 + ... + 5828976.

It is an arithmetic number, because the mean of its divisors is an integer number (35986272894).

Almost surely, 2^{1659944072490} is an apocalyptic number.

1659944072490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659944072490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303121465216).

1659944072490 is an abundant number, since it is smaller than the sum of its proper divisors (2946298857942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1659944072490 is a wasteful number, since it uses less digits than its factorization.

1659944072490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293144.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 1659944072490 in words is "one trillion, six hundred fifty-nine billion, nine hundred forty-four million, seventy-two thousand, four hundred ninety".